Note 12 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Feb. 15, 2019	Dec. 31, 2018
Goodwill, Ending Balance	$ 68,500			$ 40,100
Goodwill, Impairment Loss	0
Acquired Finite-lived Intangible Asset, Residual Value	0
Amortization of Intangible Assets, Total	2,200	$ 2,200
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	12,800
Finite-Lived Intangible Assets, Amortization Expense, Year Two	14,200
Finite-Lived Intangible Assets, Amortization Expense, Year Three	14,200
Finite-Lived Intangible Assets, Amortization Expense, Year Four	14,200
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 14,200
Cory 1st Choice Home Delivery [Member]
Goodwill, Ending Balance			$ 28,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 65,500